The killing of any animal -- including rabbits -- for food or food is called "slaughter." If the rabbit is killed because it's very sick or injured, and killing it puts it out of its misery, the term used is "euthanasia" (or, in slang, you "put the rabbit down" or "put the rabbit to sleep"). For any other killing of a rabbit, "killing" is usually the word used. The word "murder" specifically means an unlawful killing and isn't generally used in reference to animals (unless you're trying to make a political point).
Murder
bunnies
A group of rabbits is commonly referred to as a "warren." This term is often used to describe a burrow or a network of tunnels where rabbits live. Additionally, you might encounter the term "herd" or "fluffle" to describe a larger gathering of rabbits in the wild. Each term highlights the social nature of rabbits as they often live in groups for protection and companionship.
A pair of rabbits is commonly referred to as a "brace" in hunting terminology.
The term warren refers to a colony of rabbits. It can also be used to describe the underground tunnels where a group of rabbits live.
Pregnant rabbits are commonly referred to as "does." The term "kindling" is used to describe the process of giving birth in rabbits. A litter typically consists of multiple kits, which are the baby rabbits.
A pair of any small game (rabbits, ducks, etc.) is called a brace.
The term for cooking is "rabbits," and many people do enjoy rabbit pie. .......................................................... Others think eating rabbits is wrong; rabbits are cute not tasty.
Genocide
There are no water rabbits in nature. The term "water rabbit" might refer to the Chinese zodiac; specifically, someone born in 1903, 1951, 1963, or 2011.
murder or homicide
Assassinate is not a term, it's a word. It means a planned murder.